and nbc's team coverage of the terror attack in boston continues here on news 4 and on nbc nightly news with brian williams at 7:00. >>> and runners from our area, home and describing the chaos they witnessed. one man was directly across the street. mark segraves has more. >> reporter: well, that is right, for john walls and his family, the boston marathon is an annual tradition. his wife has run it 17 times. he has run it three times and this was going to be their daughter's first boston marathon. he was in the grandstands waiting for them to come across the finish line. when the bomb went off he had his video camera rolling. >> oh, no, get out of the stands, get out of the stands. >> when the second one went off, i thought god, you know, we're going to die here. >> reporter: john walls, along with his wife and daughter returned to the arms of their family today at reagan international. the former journalist says yesterday was like nothing he has ever seen. >> the police are screaming, directing you, telling you leave, leave, leave. >> reporter: as he and his family tried to escape the